Tilapia by-product hydrolysate powder in diets for Nile tilapia larvae

Sary, Cesar; Paris, Leandro Daniel De; Bernardi, Daniela Miotto; Lewandowski, Vanessa; Signor, Altevir; Boscolo, Wilson Rogério

doi:10.4025/actascianimsci.v39i1.32805

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Acta Scientiarum. Animal Sciences

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AQUICULTURA • Acta Sci., Anim. Sci. 39 (1) • Mar 2017 • https://doi.org/10.4025/actascianimsci.v39i1.32805 copy

Tilapia by-product hydrolysate powder in diets for Nile tilapia larvae

Hidrolisado proteico seco do resíduo da filetagem de tilápias em dietas para larvas de tilápia do Nilo

Authorship SCIMAGO INSTITUTIONS RANKINGS

ABSTRACT.

This study aimed to evaluate the digestibility of tilapia by-product protein hydrolysate powder (TBHP) from tilapia filleting by-product, and its inclusion in diets for Nile tilapia larvae. In order to determine the apparent digestibility coefficients, two diets were formulated, the reference diet and the test diet (20% of TBHP) and, to evaluate the inclusion, six diets were formulated, which were with 0.0, 2.0; 4.0; 6.0, and 8.0% of TBHP. The apparent digestibility coefficients of crude protein and gross energy were 89.5 and 98.3%, respectively. At levels above 4.0% of inclusion of TBHP, the weight, final length and weight gain were impaired, however, survival rate was higher (p < 0.05). The TBHP can be used in diets for tilapia due to the high digestibility coefficients for crude protein and gross energy. The inclusion of up to 4.0% of TBHP does not affect the reproductive performance and survival rate of Nile tilapia larvae.

Keywords:
digestibility; fish nutrition; performance

Ingredients	Quantity (%)
Soybean	28.60
Rice	25.00
Corn grain	16.88
Fish meal	15.00
Wheat	8.00
Poultry meal by-products	5.00
Premix-APP	1.00
Salt	0.30
Propionic acid	0.20
Antioxidant (BHT)	0.02
Total	100.00

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[1] *Author for correspondence. E-mail: cesar.sjp87@gmail.com

Ingredient	TBHP inclusion (%)
Ingredient	0.0	2.0	4.0	6.0	8.0
Soybean meal	39.59	37.95	36.31	34.67	33.03
Corn gluten (60%)	23.39	23.15	22.92	22.69	22.46
Broken rice	10.36	10.68	11.00	11.33	11.65
Corn grain	10.00	10.00	10.00	10.00	10.00
Soybean protein hydrolysate	5.00	5.00	5.00	5.00	5.00
Soybean oil	3.50	3.27	3.04	2.81	2.58
Dicalcium phosphate	3.15	2.72	2.28	1.85	1.41
Wheat gluten	2.00	2.00	2.00	2.00	2.00
Premix-APP¹	1.00	1.00	1.00	1.00	1.00
L-lysine HCL	0.62	0.58	0.55	0.52	0.49
Salt	0.30	0.30	0.30	0.30	0.30
Limestone	0.26	0.52	0.77	1.03	1.28
L-threonine	0.26	0.25	0.24	0.24	0.23
Antifungal²	0.20	0.20	0.20	0.20	0.20
Choline chloride	0.10	0.10	0.10	0.10	0.10
Propionic acid	0.10	0.10	0.10	0.10	0.10
DL-methionine	0.07	0.07	0.07	0.07	0.06
L-tryptophan	0.03	0.04	0.04	0.04	0.04
Antioxidant (BHT)³	0.02	0.02	0.02	0.02	0.02
TBHP	0.00	2.00	4.00	6.00	8.00
Provision
Lysine (%)	2.20	2.20	2.20	2.20	2.20
Methionine (%)	0.75	0.75	0.75	0.75	0.75
Threonine (%)	1.70	1.70	1.70	1.70	1.70
Tryptophan (%)	0.43	0.43	0.43	0.43	0.43
Total lipids (%)	5.24	4.99	4.73	4.476	4.22
Crude protein (%)	40.50	40.55	40.61	40.66	40.72
Digestible energy (kcal kg^-1)	3500.0	3500.0	3500.0	3500.0	3500.0
Digestible protein (%)	38,60	38,60	38,60	38,60	38,60

Chemical composition		Apparent digestibility coefficient
Crude protein (%)	47.25	Crude protein (%)	89.61
Gross energy (kcal kg^-1)	3676.50	Gross energy (%)	98.31
Dry matter (%)	94.89	Dry matter (%)	79.52
Ash (%)	19.58
Total lipids (%)	2.27
Calcium (%)	0.73	Digestible protein (%)	42.34
Phosphorus (%)	4.51	Digestible energy (kcal kg^-1)	3614.37

Parameters	Inclusion of TBHP (%)
Parameters	0.0	2.0	4.0	6.0	8.0
Initial weight (g)	0.06	0.06	0.06	0.06	0.06
Initial length (cm)	1.57	1.57	1.57	1.57	1.57
Final weight (g)	1.52^a	1.30^ab	1.27^ab	1.10^bc	0.89^c
Final length (cm)	4.33^a	4.08^abc	4.08^ab	3.85^bc	3.70^c
Weight gain (g)	1.49^a	1.22^ab	1.21^ab	1.04^bc	0.82^c
Biomass (g)	9.76	8.05	12.27	10.36	10.34
Survival (%)	42.70^b	41.30^b	64.00^ab	62.70^ab	77.30^a